| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_20688220cab72ad01902ff5223732946 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-035
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C2001-03511
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C5-164 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-061
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-053
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-067 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C5-16
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-035 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-295
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-06
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-053
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-61 |
| filingDate |
1997-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2000-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_903078affba335f7bde7c185fc6ab96f
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3da0fe896bfdd97c302ccc4644688d50 |
| publicationDate |
2000-03-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6033825-A |
| titleOfInvention |
Silver-halide recording material to produce negatives with reduced fog and ultrahardgradation |
| abstract |
PCT No. PCT/EP97/02334 Sec. 371 Date Oct. 29, 1998 Sec. 102(e) Date Oct. 29, 1998 PCT Filed May 7, 1997 PCT Pub. No. WO97/42545 PCT Pub. Date Nov. 13, 1997Photographic silver-halide materials for producing negative images with ultrahard-gradation contrast, which contain a hydrazine compound and a contrast-boosting amino compound and/or phosphonium compound, demonstrate a marked tendency to form "black fog" which results in inadequate acutance. By adding 200 to 2500 mg per mol of silver of a polyvinyl lactam to the emulsion, the fog is inhibited and acutance is improved without reducing sensitivity. The invention can be used to produce images during reproduction in the pre-printing stage. |
| priorityDate |
1996-05-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |